2 #include "../gst_private.h"
4 #include <glib-object.h>
10 #include "../gst-i18n-lib.h"
12 #include "../gstconfig.h"
13 #include "../gstparse.h"
14 #include "../gstinfo.h"
15 #include "../gsterror.h"
16 #include "../gststructure.h"
17 #include "../gsturi.h"
18 #include "../gstutils.h"
19 #include "../gstvalue.h"
20 #include "../gstchildproxy.h"
23 /* All error messages in this file are user-visible and need to be translated.
24 * Don't start the message with a capital, and don't end them with a period,
25 * as they will be presented inside a sentence/error.
28 #define YYERROR_VERBOSE 1
30 #define YYENABLE_NLS 0
32 #ifndef YYLTYPE_IS_TRIVIAL
33 #define YYLTYPE_IS_TRIVIAL 0
36 typedef void* yyscan_t;
39 #ifdef __GST_PARSE_TRACE
40 static guint __strings;
42 static guint __chains;
44 __gst_parse_strdup (gchar *org)
49 /* g_print ("ALLOCATED STR (%3u): %p %s\n", __strings, ret, ret); */
53 __gst_parse_strfree (gchar *str)
56 /* g_print ("FREEING STR (%3u): %p %s\n", __strings - 1, str, str); */
58 g_return_if_fail (__strings > 0);
62 link_t *__gst_parse_link_new ()
66 ret = g_slice_new0 (link_t);
67 /* g_print ("ALLOCATED LINK (%3u): %p\n", __links, ret); */
71 __gst_parse_link_free (link_t *data)
74 /* g_print ("FREEING LINK (%3u): %p\n", __links - 1, data); */
75 g_slice_free (link_t, data);
76 g_return_if_fail (__links > 0);
81 __gst_parse_chain_new ()
85 ret = g_slice_new0 (chain_t);
86 /* g_print ("ALLOCATED CHAIN (%3u): %p\n", __chains, ret); */
90 __gst_parse_chain_free (chain_t *data)
92 /* g_print ("FREEING CHAIN (%3u): %p\n", __chains - 1, data); */
93 g_slice_free (chain_t, data);
94 g_return_if_fail (__chains > 0);
98 #endif /* __GST_PARSE_TRACE */
114 /*** define SET_ERROR macro/function */
116 #ifdef G_HAVE_ISO_VARARGS
118 # define SET_ERROR(error, type, ...) \
120 GST_CAT_ERROR (GST_CAT_PIPELINE, __VA_ARGS__); \
121 if ((error) && !*(error)) { \
122 g_set_error ((error), GST_PARSE_ERROR, (type), __VA_ARGS__); \
126 #elif defined(G_HAVE_GNUC_VARARGS)
128 # define SET_ERROR(error, type, args...) \
130 GST_CAT_ERROR (GST_CAT_PIPELINE, args ); \
131 if ((error) && !*(error)) { \
132 g_set_error ((error), GST_PARSE_ERROR, (type), args ); \
139 SET_ERROR (GError **error, gint type, const char *format, ...)
143 g_warning ("error while parsing");
148 va_start (varargs, format);
149 string = g_strdup_vprintf (format, varargs);
152 g_set_error (error, GST_PARSE_ERROR, type, string);
159 #endif /* G_HAVE_ISO_VARARGS */
161 /*** define YYPRINTF macro/function if we're debugging */
163 /* bison 1.35 calls this macro with side effects, we need to make sure the
164 side effects work - crappy bison */
166 #ifndef GST_DISABLE_GST_DEBUG
169 # ifdef G_HAVE_ISO_VARARGS
171 /* # define YYFPRINTF(a, ...) GST_CAT_DEBUG (GST_CAT_PIPELINE, __VA_ARGS__) */
172 # define YYFPRINTF(a, ...) \
174 GST_CAT_LOG (GST_CAT_PIPELINE, __VA_ARGS__); \
177 # elif defined(G_HAVE_GNUC_VARARGS)
179 # define YYFPRINTF(a, args...) \
181 GST_CAT_LOG (GST_CAT_PIPELINE, args); \
187 YYPRINTF(const char *format, ...)
192 va_start (varargs, format);
193 temp = g_strdup_vprintf (format, varargs);
194 GST_CAT_LOG (GST_CAT_PIPELINE, "%s", temp);
199 # endif /* G_HAVE_ISO_VARARGS */
201 #endif /* GST_DISABLE_GST_DEBUG */
205 * include headers generated by bison & flex, after defining (or not defining) YYDEBUG
207 #include "grammar.tab.h"
208 #include "parse_lex.h"
211 #define ADD_MISSING_ELEMENT(graph,name) G_STMT_START { \
212 if ((graph)->ctx) { \
213 (graph)->ctx->missing_elements = \
214 g_list_append ((graph)->ctx->missing_elements, g_strdup (name)); \
218 no_free (gconstpointer foo)
223 #define GST_BIN_MAKE(res, type, chainval, assign, type_string_free_func) \
225 chain_t *chain = chainval; \
227 GstBin *bin = (GstBin *) gst_element_factory_make (type, NULL); \
229 SET_ERROR (graph->error, GST_PARSE_ERROR_EMPTY_BIN, \
230 _("specified empty bin \"%s\", not allowed"), type); \
231 g_slist_foreach (assign, (GFunc) gst_parse_strfree, NULL); \
232 g_slist_free (assign); \
233 gst_object_unref (bin); \
234 type_string_free_func (type); /* Need to clean up the string */ \
237 ADD_MISSING_ELEMENT(graph, type); \
238 SET_ERROR (graph->error, GST_PARSE_ERROR_NO_SUCH_ELEMENT, \
239 _("no bin \"%s\", skipping"), type); \
240 g_slist_foreach (assign, (GFunc) gst_parse_strfree, NULL); \
241 g_slist_free (assign); \
244 for (walk = chain->elements; walk; walk = walk->next ) \
245 gst_bin_add (bin, GST_ELEMENT (walk->data)); \
246 g_slist_free (chain->elements); \
247 chain->elements = g_slist_prepend (NULL, bin); \
249 /* set the properties now */ \
250 for (walk = assign; walk; walk = walk->next) \
251 gst_parse_element_set ((gchar *) walk->data, GST_ELEMENT (bin), graph); \
252 g_slist_free (assign); \
256 #define MAKE_LINK(link, _src, _src_name, _src_pads, _sink, _sink_name, _sink_pads) \
258 link = gst_parse_link_new (); \
260 link->sink = _sink; \
261 link->src_name = _src_name; \
262 link->sink_name = _sink_name; \
263 link->src_pads = _src_pads; \
264 link->sink_pads = _sink_pads; \
268 #define MAKE_REF(link, _src, _pads) \
270 gchar *padname = _src; \
271 GSList *pads = _pads; \
273 while (*padname != '.') padname++; \
276 if (*padname != '\0') \
277 pads = g_slist_prepend (pads, gst_parse_strdup (padname)); \
279 MAKE_LINK (link, NULL, _src, pads, NULL, NULL, NULL); \
283 gst_parse_free_delayed_set (DelayedSet *set)
286 g_free(set->value_str);
287 g_slice_free(DelayedSet, set);
290 static void gst_parse_new_child(GstChildProxy *child_proxy, GObject *object,
291 const gchar * name, gpointer data);
294 gst_parse_add_delayed_set (GstElement *element, gchar *name, gchar *value_str)
296 DelayedSet *data = g_slice_new0 (DelayedSet);
298 GST_CAT_LOG_OBJECT (GST_CAT_PIPELINE, element, "delaying property set %s to %s",
301 data->name = g_strdup(name);
302 data->value_str = g_strdup(value_str);
303 data->signal_id = g_signal_connect_data(element, "child-added",
304 G_CALLBACK (gst_parse_new_child), data, (GClosureNotify)
305 gst_parse_free_delayed_set, (GConnectFlags) 0);
307 /* FIXME: we would need to listen on all intermediate bins too */
308 if (GST_IS_BIN (element)) {
309 gchar **names, **current;
310 GstElement *parent, *child;
312 current = names = g_strsplit (name, "::", -1);
313 parent = gst_bin_get_by_name (GST_BIN_CAST (element), current[0]);
315 while (parent && current[0]) {
316 child = gst_bin_get_by_name (GST_BIN (parent), current[0]);
317 if (!child && current[1]) {
318 char *sub_name = g_strjoinv ("::", ¤t[0]);
320 gst_parse_add_delayed_set(parent, sub_name, value_str);
331 gst_parse_new_child(GstChildProxy *child_proxy, GObject *object,
332 const gchar * name, gpointer data)
334 DelayedSet *set = (DelayedSet *) data;
337 GObject *target = NULL;
340 GST_CAT_LOG_OBJECT (GST_CAT_PIPELINE, child_proxy, "new child %s, checking property %s",
343 if (gst_child_proxy_lookup (child_proxy, set->name, &target, &pspec)) {
344 gboolean got_value = FALSE;
346 value_type = pspec->value_type;
348 GST_CAT_LOG_OBJECT (GST_CAT_PIPELINE, child_proxy, "parsing delayed property %s as a %s from %s",
349 pspec->name, g_type_name (value_type), set->value_str);
350 g_value_init (&v, value_type);
351 if (gst_value_deserialize (&v, set->value_str))
353 else if (g_type_is_a (value_type, GST_TYPE_ELEMENT)) {
356 bin = gst_parse_bin_from_description_full (set->value_str, TRUE, NULL,
357 GST_PARSE_FLAG_NO_SINGLE_ELEMENT_BINS, NULL);
359 g_value_set_object (&v, bin);
363 g_signal_handler_disconnect (child_proxy, set->signal_id);
366 g_object_set_property (target, pspec->name, &v);
368 const gchar *obj_name = GST_OBJECT_NAME(object);
369 gint len = strlen (obj_name);
371 /* do a delayed set */
372 if ((strlen (set->name) > (len + 2)) && !strncmp (set->name, obj_name, len) && !strncmp (&set->name[len], "::", 2)) {
373 gst_parse_add_delayed_set (GST_ELEMENT(child_proxy), set->name, set->value_str);
381 g_object_unref (target);
385 GST_CAT_ERROR (GST_CAT_PIPELINE, "could not set property \"%s\" in %"
386 GST_PTR_FORMAT, pspec->name, target);
391 gst_parse_element_set (gchar *value, GstElement *element, graph_t *graph)
393 GParamSpec *pspec = NULL;
396 GObject *target = NULL;
399 /* do nothing if assignment is for missing element */
403 /* parse the string, so the property name is null-terminated and pos points
404 to the beginning of the value */
405 while (!g_ascii_isspace (*pos) && (*pos != '=')) pos++;
411 while (g_ascii_isspace (*pos)) pos++;
414 while (g_ascii_isspace (*pos)) pos++;
417 pos[strlen (pos) - 1] = '\0';
419 gst_parse_unescape (pos);
421 if (GST_IS_CHILD_PROXY (element)) {
422 if (!gst_child_proxy_lookup (GST_CHILD_PROXY (element), value, &target, &pspec)) {
423 /* do a delayed set */
424 gst_parse_add_delayed_set (element, value, pos);
427 pspec = g_object_class_find_property (G_OBJECT_GET_CLASS (element), value);
429 target = g_object_ref (element);
430 GST_CAT_LOG_OBJECT (GST_CAT_PIPELINE, target, "found %s property", value);
432 SET_ERROR (graph->error, GST_PARSE_ERROR_NO_SUCH_PROPERTY, \
433 _("no property \"%s\" in element \"%s\""), value, \
434 GST_ELEMENT_NAME (element));
438 if (pspec != NULL && target != NULL) {
439 gboolean got_value = FALSE;
441 value_type = pspec->value_type;
443 GST_CAT_LOG_OBJECT (GST_CAT_PIPELINE, element, "parsing property %s as a %s",
444 pspec->name, g_type_name (value_type));
446 g_value_init (&v, value_type);
447 if (gst_value_deserialize (&v, pos))
449 else if (g_type_is_a (value_type, GST_TYPE_ELEMENT)) {
452 bin = gst_parse_bin_from_description_full (pos, TRUE, NULL,
453 GST_PARSE_FLAG_NO_SINGLE_ELEMENT_BINS, NULL);
455 g_value_set_object (&v, bin);
461 g_object_set_property (target, pspec->name, &v);
465 gst_parse_strfree (value);
469 g_object_unref (target);
473 SET_ERROR (graph->error, GST_PARSE_ERROR_COULD_NOT_SET_PROPERTY,
474 _("could not set property \"%s\" in element \"%s\" to \"%s\""),
475 value, GST_ELEMENT_NAME (element), pos);
480 gst_parse_free_link (link_t *link)
482 gst_parse_strfree (link->src_name);
483 gst_parse_strfree (link->sink_name);
484 g_slist_foreach (link->src_pads, (GFunc) gst_parse_strfree, NULL);
485 g_slist_foreach (link->sink_pads, (GFunc) gst_parse_strfree, NULL);
486 g_slist_free (link->src_pads);
487 g_slist_free (link->sink_pads);
488 if (link->caps) gst_caps_unref (link->caps);
489 gst_parse_link_free (link);
493 gst_parse_free_delayed_link (DelayedLink *link)
495 g_free (link->src_pad);
496 g_free (link->sink_pad);
497 if (link->caps) gst_caps_unref (link->caps);
498 g_slice_free (DelayedLink, link);
502 gst_parse_found_pad (GstElement *src, GstPad *pad, gpointer data)
504 DelayedLink *link = data;
506 GST_CAT_INFO (GST_CAT_PIPELINE, "trying delayed linking %s:%s to %s:%s",
507 GST_STR_NULL (GST_ELEMENT_NAME (src)), GST_STR_NULL (link->src_pad),
508 GST_STR_NULL (GST_ELEMENT_NAME (link->sink)), GST_STR_NULL (link->sink_pad));
510 if (gst_element_link_pads_filtered (src, link->src_pad, link->sink,
511 link->sink_pad, link->caps)) {
512 /* do this here, we don't want to get any problems later on when
513 * unlocking states */
514 GST_CAT_DEBUG (GST_CAT_PIPELINE, "delayed linking %s:%s to %s:%s worked",
515 GST_STR_NULL (GST_ELEMENT_NAME (src)), GST_STR_NULL (link->src_pad),
516 GST_STR_NULL (GST_ELEMENT_NAME (link->sink)), GST_STR_NULL (link->sink_pad));
517 g_signal_handler_disconnect (src, link->signal_id);
521 /* both padnames and the caps may be NULL */
523 gst_parse_perform_delayed_link (GstElement *src, const gchar *src_pad,
524 GstElement *sink, const gchar *sink_pad,
527 GList *templs = gst_element_class_get_pad_template_list (
528 GST_ELEMENT_GET_CLASS (src));
530 for (; templs; templs = templs->next) {
531 GstPadTemplate *templ = (GstPadTemplate *) templs->data;
532 if ((GST_PAD_TEMPLATE_DIRECTION (templ) == GST_PAD_SRC) &&
533 (GST_PAD_TEMPLATE_PRESENCE(templ) == GST_PAD_SOMETIMES))
535 DelayedLink *data = g_slice_new (DelayedLink);
537 /* TODO: maybe we should check if src_pad matches this template's names */
539 GST_CAT_DEBUG (GST_CAT_PIPELINE, "trying delayed link %s:%s to %s:%s",
540 GST_STR_NULL (GST_ELEMENT_NAME (src)), GST_STR_NULL (src_pad),
541 GST_STR_NULL (GST_ELEMENT_NAME (sink)), GST_STR_NULL (sink_pad));
543 data->src_pad = g_strdup (src_pad);
545 data->sink_pad = g_strdup (sink_pad);
547 data->caps = gst_caps_copy (caps);
551 data->signal_id = g_signal_connect_data (src, "pad-added",
552 G_CALLBACK (gst_parse_found_pad), data,
553 (GClosureNotify) gst_parse_free_delayed_link, (GConnectFlags) 0);
561 * performs a link and frees the struct. src and sink elements must be given
562 * return values 0 - link performed
567 gst_parse_perform_link (link_t *link, graph_t *graph)
569 GstElement *src = link->src;
570 GstElement *sink = link->sink;
571 GSList *srcs = link->src_pads;
572 GSList *sinks = link->sink_pads;
573 g_assert (GST_IS_ELEMENT (src));
574 g_assert (GST_IS_ELEMENT (sink));
576 GST_CAT_INFO (GST_CAT_PIPELINE,
577 "linking %s:%s to %s:%s (%u/%u) with caps \"%" GST_PTR_FORMAT "\"",
578 GST_ELEMENT_NAME (src), link->src_name ? link->src_name : "(any)",
579 GST_ELEMENT_NAME (sink), link->sink_name ? link->sink_name : "(any)",
580 g_slist_length (srcs), g_slist_length (sinks), link->caps);
582 if (!srcs || !sinks) {
583 if (gst_element_link_pads_filtered (src,
584 srcs ? (const gchar *) srcs->data : NULL, sink,
585 sinks ? (const gchar *) sinks->data : NULL, link->caps)) {
588 if (gst_parse_perform_delayed_link (src,
589 srcs ? (const gchar *) srcs->data : NULL,
590 sink, sinks ? (const gchar *) sinks->data : NULL, link->caps)) {
597 if (g_slist_length (link->src_pads) != g_slist_length (link->sink_pads)) {
600 while (srcs && sinks) {
601 const gchar *src_pad = (const gchar *) srcs->data;
602 const gchar *sink_pad = (const gchar *) sinks->data;
603 srcs = g_slist_next (srcs);
604 sinks = g_slist_next (sinks);
605 if (gst_element_link_pads_filtered (src, src_pad, sink, sink_pad,
609 if (gst_parse_perform_delayed_link (src, src_pad,
620 gst_parse_free_link (link);
624 SET_ERROR (graph->error, GST_PARSE_ERROR_LINK,
625 _("could not link %s to %s"), GST_ELEMENT_NAME (src),
626 GST_ELEMENT_NAME (sink));
627 gst_parse_free_link (link);
632 static int yyerror (void *scanner, graph_t *graph, const char *s);
645 %token <s> IDENTIFIER
646 %left <s> REF PADREF BINREF
647 %token <s> ASSIGNMENT
653 %type <l> linkpart link
656 %type <p> padlist pads assignments
663 %lex-param { void *scanner }
664 %parse-param { void *scanner }
665 %parse-param { graph_t *graph }
671 element: IDENTIFIER { $$ = gst_element_factory_make ($1, NULL);
673 ADD_MISSING_ELEMENT (graph, $1);
674 SET_ERROR (graph->error, GST_PARSE_ERROR_NO_SUCH_ELEMENT, _("no element \"%s\""), $1);
675 /* if FATAL_ERRORS flag is set, we don't have to worry about backwards
676 * compatibility and can continue parsing and check for other missing
678 if ((graph->flags & GST_PARSE_FLAG_FATAL_ERRORS) == 0) {
679 gst_parse_strfree ($1);
683 gst_parse_strfree ($1);
685 | element ASSIGNMENT { gst_parse_element_set ($2, $1, graph);
689 assignments: /* NOP */ { $$ = NULL; }
690 | assignments ASSIGNMENT { $$ = g_slist_prepend ($1, $2); }
692 bin: '(' assignments chain ')' { GST_BIN_MAKE ($$, "bin", $3, $2, no_free); }
693 | BINREF assignments chain ')' { GST_BIN_MAKE ($$, $1, $3, $2, gst_parse_strfree);
694 gst_parse_strfree ($1);
696 | BINREF assignments ')' { GST_BIN_MAKE ($$, $1, NULL, $2, gst_parse_strfree);
697 gst_parse_strfree ($1);
699 | BINREF assignments error ')' { GST_BIN_MAKE ($$, $1, NULL, $2, gst_parse_strfree);
700 gst_parse_strfree ($1);
704 pads: PADREF { $$ = g_slist_prepend (NULL, $1); }
705 | PADREF padlist { $$ = $2;
706 $$ = g_slist_prepend ($$, $1);
709 padlist: ',' IDENTIFIER { $$ = g_slist_prepend (NULL, $2); }
710 | ',' IDENTIFIER padlist { $$ = g_slist_prepend ($3, $2); }
713 reference: REF { MAKE_REF ($$, $1, NULL); }
714 | REF padlist { MAKE_REF ($$, $1, $2); }
717 linkpart: reference { $$ = $1; }
718 | pads { MAKE_REF ($$, NULL, $1); }
719 | /* NOP */ { MAKE_REF ($$, NULL, NULL); }
722 link: linkpart LINK linkpart { $$ = $1;
724 $$->caps = gst_caps_from_string ($2);
725 if ($$->caps == NULL)
726 SET_ERROR (graph->error, GST_PARSE_ERROR_LINK, _("could not parse caps \"%s\""), $2);
727 gst_parse_strfree ($2);
729 $$->sink_name = $3->src_name;
730 $$->sink_pads = $3->src_pads;
731 gst_parse_link_free ($3);
735 linklist: link { $$ = g_slist_prepend (NULL, $1); }
736 | link linklist { $$ = g_slist_prepend ($2, $1); }
737 | linklist error { $$ = $1; }
740 chain: element { $$ = gst_parse_chain_new ();
741 $$->first = $$->last = $1;
742 $$->front = $$->back = NULL;
743 $$->elements = g_slist_prepend (NULL, $1);
746 | chain chain { if ($1->back && $2->front) {
747 if (!$1->back->sink_name) {
748 SET_ERROR (graph->error, GST_PARSE_ERROR_LINK, _("link without source element"));
749 gst_parse_free_link ($1->back);
751 graph->links = g_slist_prepend (graph->links, $1->back);
753 if (!$2->front->src_name) {
754 SET_ERROR (graph->error, GST_PARSE_ERROR_LINK, _("link without sink element"));
755 gst_parse_free_link ($2->front);
757 graph->links = g_slist_prepend (graph->links, $2->front);
760 } else if ($1->back) {
761 if (!$1->back->sink_name) {
762 $1->back->sink = $2->first;
764 } else if ($2->front) {
765 if (!$2->front->src_name) {
766 $2->front->src = $1->last;
768 $1->back = $2->front;
772 graph->links = g_slist_prepend (graph->links, $1->back);
776 $1->elements = g_slist_concat ($1->elements, $2->elements);
778 gst_parse_chain_free ($2);
781 | chain linklist { GSList *walk;
783 $2 = g_slist_prepend ($2, $1->back);
786 if (!((link_t *) $2->data)->src_name) {
787 ((link_t *) $2->data)->src = $1->last;
790 for (walk = $2; walk; walk = walk->next) {
791 link_t *link = (link_t *) walk->data;
792 if (!link->sink_name && walk->next) {
793 SET_ERROR (graph->error, GST_PARSE_ERROR_LINK, _("link without sink element"));
794 gst_parse_free_link (link);
795 } else if (!link->src_name && !link->src) {
796 SET_ERROR (graph->error, GST_PARSE_ERROR_LINK, _("link without source element"));
797 gst_parse_free_link (link);
800 graph->links = g_slist_prepend (graph->links, link);
809 | chain error { $$ = $1; }
810 | link chain { if ($2->front) {
811 if (!$2->front->src_name) {
812 SET_ERROR (graph->error, GST_PARSE_ERROR_LINK, _("link without source element"));
813 gst_parse_free_link ($2->front);
815 graph->links = g_slist_prepend (graph->links, $2->front);
818 if (!$1->sink_name) {
819 $1->sink = $2->first;
824 | PARSE_URL chain { $$ = $2;
826 GstElement *element =
827 gst_element_make_from_uri (GST_URI_SRC, $1, NULL, NULL);
828 /* FIXME: get and parse error properly */
830 SET_ERROR (graph->error, GST_PARSE_ERROR_NO_SUCH_ELEMENT,
831 _("no source element for URI \"%s\""), $1);
833 $$->front->src = element;
834 graph->links = g_slist_prepend (
835 graph->links, $$->front);
837 $$->elements = g_slist_prepend ($$->elements, element);
840 SET_ERROR (graph->error, GST_PARSE_ERROR_LINK,
841 _("no element to link URI \"%s\" to"), $1);
845 | link PARSE_URL { GstElement *element =
846 gst_element_make_from_uri (GST_URI_SINK, $2, NULL, NULL);
847 /* FIXME: get and parse error properly */
849 SET_ERROR (graph->error, GST_PARSE_ERROR_NO_SUCH_ELEMENT,
850 _("no sink element for URI \"%s\""), $2);
851 gst_parse_link_free ($1);
854 } else if ($1->sink_name || $1->sink_pads) {
855 gst_object_unref (element);
856 SET_ERROR (graph->error, GST_PARSE_ERROR_LINK,
857 _("could not link sink element for URI \"%s\""), $2);
858 gst_parse_link_free ($1);
862 $$ = gst_parse_chain_new ();
863 $$->first = $$->last = element;
865 $$->front->sink = element;
866 $$->elements = g_slist_prepend (NULL, element);
871 graph: /* NOP */ { SET_ERROR (graph->error, GST_PARSE_ERROR_EMPTY, _("empty pipeline not allowed"));
874 | chain { $$ = graph;
876 if (!$1->front->src_name) {
877 SET_ERROR (graph->error, GST_PARSE_ERROR_LINK, _("link without source element"));
878 gst_parse_free_link ($1->front);
880 $$->links = g_slist_prepend ($$->links, $1->front);
885 if (!$1->back->sink_name) {
886 SET_ERROR (graph->error, GST_PARSE_ERROR_LINK, _("link without sink element"));
887 gst_parse_free_link ($1->back);
889 $$->links = g_slist_prepend ($$->links, $1->back);
901 yyerror (void *scanner, graph_t *graph, const char *s)
903 /* FIXME: This should go into the GError somehow, but how? */
904 GST_WARNING ("Error during parsing: %s", s);
910 priv_gst_parse_launch (const gchar *str, GError **error, GstParseContext *ctx,
920 g_return_val_if_fail (str != NULL, NULL);
921 g_return_val_if_fail (error == NULL || *error == NULL, NULL);
929 #ifdef __GST_PARSE_TRACE
930 GST_CAT_DEBUG (GST_CAT_PIPELINE, "TRACE: tracing enabled");
931 __strings = __chains = __links = 0;
932 #endif /* __GST_PARSE_TRACE */
934 dstr = g_strdup (str);
935 priv_gst_parse_yylex_init (&scanner);
936 priv_gst_parse_yy_scan_string (dstr, scanner);
942 if (yyparse (scanner, &g) != 0) {
943 SET_ERROR (error, GST_PARSE_ERROR_SYNTAX,
944 "Unrecoverable syntax error while parsing pipeline %s", str);
946 priv_gst_parse_yylex_destroy (scanner);
951 priv_gst_parse_yylex_destroy (scanner);
954 GST_CAT_DEBUG (GST_CAT_PIPELINE, "got %u elements and %u links",
955 g.chain ? g_slist_length (g.chain->elements) : 0,
956 g_slist_length (g.links));
960 } else if (!g.chain->elements->next) {
961 /* only one toplevel element */
962 ret = (GstElement *) g.chain->elements->data;
963 g_slist_free (g.chain->elements);
964 if (GST_IS_BIN (ret))
966 gst_parse_chain_free (g.chain);
968 /* put all elements in our bin */
969 bin = GST_BIN (gst_element_factory_make ("pipeline", NULL));
972 for (walk = g.chain->elements; walk; walk = walk->next) {
973 if (walk->data != NULL)
974 gst_bin_add (bin, GST_ELEMENT (walk->data));
977 g_slist_free (g.chain->elements);
978 ret = GST_ELEMENT (bin);
979 gst_parse_chain_free (g.chain);
983 for (walk = g.links; walk; walk = walk->next) {
984 link_t *l = (link_t *) walk->data;
988 l->src = gst_bin_get_by_name_recurse_up (bin, l->src_name);
990 gst_object_unref (l->src);
992 l->src = strcmp (GST_ELEMENT_NAME (ret), l->src_name) == 0 ? ret : NULL;
997 SET_ERROR (error, GST_PARSE_ERROR_NO_SUCH_ELEMENT,
998 "No element named \"%s\" - omitting link", l->src_name);
1000 /* probably a missing element which we've handled already */
1002 gst_parse_free_link (l);
1009 l->sink = gst_bin_get_by_name_recurse_up (bin, l->sink_name);
1011 gst_object_unref (l->sink);
1013 l->sink = strcmp (GST_ELEMENT_NAME (ret), l->sink_name) == 0 ? ret : NULL;
1018 SET_ERROR (error, GST_PARSE_ERROR_NO_SUCH_ELEMENT,
1019 "No element named \"%s\" - omitting link", l->sink_name);
1021 /* probably a missing element which we've handled already */
1023 gst_parse_free_link (l);
1027 gst_parse_perform_link (l, &g);
1029 g_slist_free (g.links);
1032 #ifdef __GST_PARSE_TRACE
1033 GST_CAT_DEBUG (GST_CAT_PIPELINE,
1034 "TRACE: %u strings, %u chains and %u links left", __strings, __chains,
1036 if (__strings || __chains || __links) {
1037 g_warning ("TRACE: %u strings, %u chains and %u links left", __strings,
1040 #endif /* __GST_PARSE_TRACE */
1046 g_slist_foreach (g.chain->elements, (GFunc)gst_object_unref, NULL);
1047 g_slist_free (g.chain->elements);
1048 gst_parse_chain_free (g.chain);
1051 g_slist_foreach (g.links, (GFunc)gst_parse_free_link, NULL);
1052 g_slist_free (g.links);